from django.contrib.auth.backends import ModelBackend
import re
from users.models import User

class MyAuthenticateBackend(ModelBackend):

    def authenticate(self, request, username=None, password=None, **kwargs):
        try:

            # 1,判断username, 是否是手机号
            if re.match(r'^1[3-9]\d{9}$', username):

                user = User.objects.get(mobile=username)

            else:
                # 2,是否使用用户名查询
                user = User.objects.get(username=username)

        except User.DoesNotExist:
            return None

        if user.check_password(password):
            return user
